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Slab 430 stainless steel continuous casting crystallizer casting powder

A continuous casting mold and stainless steel technology, which is applied in the field of slab 430 stainless steel continuous casting mold mold powder, can solve the problems of bonding breakout, billet shell deformation, and high mold powder requirements

Active Publication Date: 2015-03-25
HENAN XIBAO METALLURGICAL MATERIALS GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the casting steel is all stainless steel, the requirements for mold flux are very high, especially for 430 stainless steel due to its special shrinkage characteristics, the billet shell is easily deformed during the casting process, resulting in waste products, and even bonding breakouts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: A kind of slab 430 stainless steel continuous casting mold powder, its chemical composition mass percentage content is as follows: Li 2 O: 0.8%, MnO: 0.5%, F - : 4.5%, free carbon: 3.5%, SiO 2 : 32%, CaO: 32.6%, Al 2 o 3 : 11.0%: Na 2 O: 13.2%, MgO: 1.2%, Fe 2 o 3： 1.2%, k 2 O: 0.5%, binary alkalinity (CaO / SiO 2 ) is 0.7~1.0.

[0020] The raw materials of the slab 430 stainless steel continuous casting mold powder include the following ingredients: 2.0% of 363 carbon black, 2.5% of N660 carbon black, 3.5% of bentonite, 2.5% of lithium carbonate, 5.0% of manganese carbonate, 13.0% of soda ash, firefly Stone 11.0%, Bauxite 3.0%, Quartz 1.8%, Wollastonite 43.7%, Premelt 12.0%.

[0021] The main component of the premelt is SiO 2 : 42%, CaO: 35%, Na 2 O: 15%, Al 2 o 3 : 6.5% and other trace elements.

Embodiment 2

[0022] Embodiment 2: A kind of slab 430 stainless steel continuous casting mold powder, its chemical composition mass percentage content is as follows: Li 2 O: 1.2%, MnO: 1.5%, F - : 4.5%, free carbon: 4.5%, SiO 2 : 32%, CaO: 30.6%, Al 2 o 3 : 10.0%: Na 2 O: 12.2%, MgO: 1.6%, Fe 2 o 3： 1.8%, k 2 O: 0.1%, binary alkalinity (CaO / SiO 2 ) is 0.7~1.0.

[0023] The raw materials of the slab 430 stainless steel continuous casting mold powder include the following ingredients: 2.0% of 363 carbon black, 2.5% of N660 carbon black, 3.5% of bentonite, 2.5% of lithium carbonate, 6.0% of manganese carbonate, 11.0% of soda ash, firefly Stone 10.0%, Bauxite 3.0%, Quartz 1.8%, Wollastonite 41.7%, Premelt 16.0%.

[0024] The main component of the premelt is SiO 2 : 42%, CaO: 35%, Na 2 O: 15%, Al 2 o 3 : 6.5% and other trace elements.

Embodiment 3

[0025] Embodiment 3: A kind of slab 430 stainless steel continuous casting mold powder, its chemical composition mass percentage content is as follows: Li 2 O: 1.0%, MnO: 1.2%, F - : 5.0%, free carbon: 4.0%, SiO 2 : 32%, CaO: 30.1%, Al 2 o 3 : 10.5%: Na 2 O: 12.7%, MgO: 1.5%, Fe 2 o 3： 1.5%, k 2 O: 0.5%, binary alkalinity (CaO / SiO 2 ) is 0.7~1.0.

[0026] The raw materials of the slab 430 stainless steel continuous casting mold powder include the following ingredients: 2.0% of 363 carbon black, 2.5% of N660 carbon black, 3.5% of bentonite, 2.5% of lithium carbonate, 5.0% of manganese carbonate, 12.0% of soda ash, firefly Stone 10.0%, Bauxite 3.0%, Quartz 1.8%, Wollastonite 42.7%, Premelt 15.0%.

[0027] The main component of the premelt is SiO 2 : 42%, CaO: 35%, Na 2 O: 15%, Al 2 o 3 : 6.5% and other trace elements.

[0028] The present invention is described in further detail below:

[0029] In order to speed up the heat transfer and make the billet shell form...

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PUM

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Abstract

The invention provides slab 430 stainless steel continuous casting crystallizer casting powder. The chemical components of the slab 430 stainless steel continuous casting crystallizer casting powder include, by mass, 0.8-1.2 percent of Li2O, 0.5-1.5 percent of MnO, 4.5-5.5 percent of F-, 3.5-4.5 percent of free carbon, 28-33 percent of SiO2, 25.5-32.0 percent of CaO, 9.0-12 percent of Al2O3, 10-15 percent of Na2O, 1.2-1.8 percent of MgO, 1.2-2.0 percent of Fe2O3 and 1.0 percent of k2O<, and the binary basicity (CaO / SiO2) is 0.7-1.0. The slab 430 stainless steel continuous casting crystallizer casting powder can be melted uniformly with a few slag rims, the thickness of liquid casting powder is 10-12 mm at the normal pull rate, the consumption quantity per ton of steel is 0.40-0.60 Kg, and the non-cleaning rate of the surfaces of casting blanks can reach up to 98 percent.

Description

technical field [0001] The invention relates to mold flux for continuous casting of slab 430 stainless steel, in particular to mold flux for continuous casting of slab 430 stainless steel. Background technique [0002] With the advancement of science and technology, stainless steel continuous casting technology has gradually matured. However, due to the continuous improvement of steelmaking technology, the pace of steelmaking has accelerated, and the amount of steel tapping from the furnace has increased. Compared with steelmaking and subsequent steel rolling capabilities, the production capacity of continuous casting machines is still a restrictive link in the entire steel production process. . For this reason, in recent years, iron and steel enterprises at home and abroad have generally adopted high-efficiency continuous casting technology. Therefore, slab continuous casting has been paid more and more attention at home and abroad. However, the realization of the slab c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/111
CPCB22D11/111
Inventor 李书成李伟锋范李飞宋志刚
Owner HENAN XIBAO METALLURGICAL MATERIALS GROUP
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